What causes the ticking sound after the engine shuts off?

[Mercedes]

The reason for the ticking sound after the engine shuts off is that the engine cooling system is still working, which is the sound of the electric fan operating. Precautions for using car engines are as follows: Avoid driving in neutral: The engine itself has a fuel cut-off function during deceleration, and driving in neutral is not conducive to fuel economy. Pay attention to observation when using the vehicle: If oil is found on the ground, determine whether there is an engine oil leak and communicate with the car 4S store in time to eliminate potential safety hazards. Do not turn off the engine immediately: For cars equipped with turbochargers, do not turn off the engine immediately after high-speed driving or climbing a slope. Let the engine idle for 10 minutes before shutting it off. Cars with turbochargers accumulate carbon deposits several times faster than naturally aspirated cars.